Burglar-alarm.



G. S. HEAD.

BURGLAR ALARM.

APPLICATION FILED MAY 21, 1913.

Patented Dec. 23, 1913.

COLUMBIA PLANOGRAPH CO-,WASHINUTON. D. c.

CARLOS S. HEAD, OF ORANGE, CALIFORNIA.

BURGLAR-ALARM.

Specification of Letters Patent.

Application filed May 21, 1913.

Patented Dec.23,1913.

Serial No. 769,070.

To all whom it may concern Be it known that I, CARLOS S. I'IEAD, a citizen of the United States, residing at Orange, in the county of Orange and State of California have invented a new and useful Burglar-Alarm, of which the following is a specification.

This invention relates to burglar alarms and to a device which is adapted to be placed in position with one end against a door, window or screen, and the other end suitably braced, and which when disturbed from the position set, will automatically operate to give an alarm and to cause the alarm to be given irrespective of the direction in which the disarrangement of the window, door or screen occurs. In other words, the device will operate to give the alarm whether the door is pushed inwardly or opened outwardly.

Another object is to provide for preventing the bell from being muflied by the bur- 'lar. b Referring to the drawings: Figure 1 is a perspective view showing the device placed in one position against the door and braced against the floor. Fig. 2 is a plan View of the device, partly in section. Fig. 8 is a section on line ac -m Fig. 2. Fig. 4 is a vertical section through a door and screen, showing the hand of a burglar untastening the screen, the burglar alarm being set to operate upon the screen being swung outwardly. Fig. 5 is a plan view partly in section through a door showing the burglar alarm set to be operated when the door is moved inwardly. Fig. 6 is a plan of the bell with the cover removed. Fig. 7 is a section on line w ae Fig. 2. Fig. 8 is a perspective of a portion of a window showing the burglar alarm as set against the two sash of the window, such that the alarm will operate whether the upper or lower sash or both, is raised or lowered. Fig. 9 is a section through the end of the burglar alarm showing the cushion tip.

The burglar alarm comprises a member capable of elongating or shortening, with a bell connected therewith, and caused to operate by an elongating or shortening movement of the member, together with a spring means for causing the member to normally elongate.

In use the device is placed with one end of the member against the door or other movable part of the building through which the burglar might enter, with the other end of the member rested against a stationary partof the building, such that when the movable part of the building is opened, for example, in such a manner as to allow the said member to be elongated by the spring, it will then operate to ring the bell, or it the door be opened inwardly, it will act to shorten the member and thereby cause the bell to ring, ringing of the bell being accomplished in either instance, and the bell will continue to ring, within the limit of its capacity, for as long as the door is pushedinwardly to hold the said member shortened, or for as long as the member is allowed to elongate and remain elongated, as by opening the door and the burglar alarm falling to the floor. The said member comprises two blade members 1 and 2, with studs 3 on the member 1 projecting through slots e in the member 2 and holding the two memhere in slidable relation. The member 1 has a pointed end 5 adapted to rest against the door, window or screen or other movable part of the building which it is to protect, and the member 2 having a double prong end 6 adapted to rest against the floor or other adjacent stationary part of the build- 111g.

7 is a spring connected to the members 1 and 2, the spring herein shown being U- shaped and acting to elongate the members 1 and 2.

Supported by the member 2 is a bell or other alarm 8 which may be of any desired construction and which is caused to ring or operate by a pin 9 which projects therefrom, the construction being such that whenever the pin 9 is pushed inwardly toward the bell or alarm, it will cause the bell or alarm to operate and continue in operation so long as the pin is held in such inward position. Carried by the member 1 are two studs 10 and 10 either of which is adapted to be moved under the pin 9 and there is thereby a wedging action against the rounded head 11 of the pin 9 and thereby pushes the pin 9 inwardly. Thus if the members 1 and 2 be moved to shorten the distance between their extreme points, the stud 10 will be moved against the head 11 and operate the pin 9, while it the members are allowed to elongate by the spring 7, the stud 10 will be moved against the head 11 and will operate the pin 9.

In order to guard thebell and prevent the same from being muffled, I provide the guard 12 which is secured to the member 2. If a burglar in reaching in should grip the bell in his hand in the attempt to muffle its sound, he would grip the guard 12 and the bell 8 would continue to ring unmuflled.

In operation, if the device is to be set to guard a door which opens inwardly, it may be set as shown in Fig. 1, with its lower end against the floor and its upper end 5 against the door. In setting it into position it will be wedged into position with suflicient pressure so that the two members 1 and 2 will be held in the proper relative position with the head 11 midway between the studs 10 and 10 When the door is pushed open by the burglar or anyone else, it will act to slide the member 1 inwardly and will bring stud 10 against head 11 and cause the bell to ring. If during such inward pushing of the door the alarm became disarranged and fell to the floor, the alarm would still continue to ring on account of the spring 7 expaneling and moving the member 1 outwardly, thereby bringing stud 1O against the pin 9.

If the device is to guard a screen from opening outwardly, it should be placed as shown in Fig. 4, with one end against the screen and the other against the wall or floor, and upon the screen being swung open, it will allow spring 7 to expand and will move stud 10 against pin 9 and cause the bell to ring and continue ringing until the member 5 is again pushed inwardly to bring the pin 9 midway between studs 10 and 10 If the device is to be set to guard the sash of a window, it may be set as shown in Fig. 8, one end against one sash and the other end engaging the other sash. A downward movement of the upper sashwil shorten the slidable members and cause the bell to ring, as will an upward movement of the lower sash. Or a downward movement of the lower sash or an upward movement of the upper sash will act to elongate the slidable members and also cause the bell to ring, or if the device falls from its position, it will automatically ring on account of the elongation of the slidable members produced by spring 7.

If it is desired to protect the woodwork from being damaged, the ends of the device may have a ruber tip 13 as shown in F 9, which will give the necessary grip on the surface without disfiguring the surface.

In order to lock the slidable members in a definite position with the alarm inoperative as when the device is notset in position for use, a pin 14 is employed which projects I through holes formed in the two members to receive it. This pin may be held against loss by spring 15 secured to one of the members 2 and capable of swinging around when the pin is withdrawn.

lVhat I claim is:

1. A burglar alarm comprising a member capable of elongating or shortening, spring means for elongating said member, an alarm device connected with said member, and means on said member for operating said alarm upon an elongating or shortening movement of said member.

2. A burglar alarm comprising two slid able members, a bell carried by one of said members, a button for operating the bell and two abutment means on one of said members, either abutment means slidable into relation with said button to operate the bell, and a spring for moving the slidable members to elongate the same.

3. A burglar alarm comprising two bars, a pair of studs on one bar received in slots in the other, a pair of abutment studs on one bar, a bell carried by the other bar, an abutment for operating said bell lying between said abutment studs and operated by either of said studs, and a spring for moving said bars to elongate them.

4. A burglar alarm comprising two bars slidably connected, a spring for elongating the bars, a bell guard on one of said bars, a bell within said guard, a button for operating the bell, and a pair of abutment studs on one of said bars movable against said button to operate the bell.

5. A burglar alarm comprising two slidably connected bars, each of which has a pointed end, a spring for elongating said bars, a bell carried by one of said bars, a button for operating said bell, and two abutments caried by one of said bars and adapted to be moved against said button to operate the bell.

6. A burglar alarm comprising two bars slidably connected, a bell on one of said bars, a spring for elongating said bars, a button for operating said bell, two abutments on one of said bars movable against said button, both of said bars having a hole and a pin adapted to engage in each of said holes to hold the bars from longitudinal movement, and means adjustably supporting said pin from one of said bars.

In testimony whereof, I have hereunto set my hand at Grange, California this 29th day of April, 1913.

CARLOS S. HEAD.

In presence of H. R. ANDRE, C. D. HINDLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent: Washington, D. C. 

